src/m/aviion.h

   1 /* machine description file for Data General AViiON.
   2    Copyright (C) 1985, 1986, 1991, 2001, 2002, 2003, 2004,
   3                  2005, 2006, 2007  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22
  23 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  24    is the most significant byte.  */
  25
  26 #define WORDS_BIG_ENDIAN
  27
  28 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  29  * group of arguments and treat it as an array of the arguments.  */
  30
  31 #define NO_ARG_ARRAY
  32
  33 /* Define WORD_MACHINE if addresses and such have
  34  * to be corrected before they can be used as byte counts.  */
  35
  36 #define WORD_MACHINE
  37
  38 /* Define DATA_SEG_BITS if pointers need to be corrected with
  39    a segment field.  */
  40
  41 #ifdef FIX_ADDRESS
  42 #define DATA_SEG_BITS 0xef000000
  43 #endif
  44
  45 /* Now define a symbol for the cpu type, if your compiler
  46    does not define it automatically:
  47    Ones defined so far include vax, m68000, ns16000, pyramid,
  48    orion, tahoe, APOLLO and many others */
  49
  50 #ifndef m88k
  51 #define m88k
  52 #endif
  53
  54 /* Use type int rather than a union, to represent Lisp_Object */
  55 /* This is desirable for most machines.  */
  56
  57 #define NO_UNION_TYPE
  58
  59 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  60    the bit field into an int.  In other words, if bit fields
  61    are always unsigned.
  62
  63    If you use NO_UNION_TYPE, this flag does not matter.  */
  64
  65 #define EXPLICIT_SIGN_EXTEND
  66
  67 /* Data type of load average, as read out of kmem.  */
  68
  69 /* #define LOAD_AVE_TYPE long */
  70
  71 /* Convert that into an integer that is 100 for a load average of 1.0  */
  72
  73 /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
  74
  75 /* Define CANNOT_DUMP on machines where unexec does not work.
  76    Then the function dump-emacs will not be defined
  77    and temacs will do (load "loadup") automatically unless told otherwise.  */
  78
  79 /* #define CANNOT_DUMP */
  80
  81 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  82    pure and impure space as loaded can vary, and even their
  83    relative order cannot be relied on.
  84
  85    Otherwise Emacs assumes that text space precedes data space,
  86    numerically.  */
  87
  88 /* #define VIRT_ADDR_VARIES */
  89
  90 #define alloca(x) __builtin_alloca(x)
  91
  92 /* Define NO_REMAP if memory segmentation makes it not work well
  93    to change the boundary between the text section and data section
  94    when Emacs is dumped.  If you define this, the preloaded Lisp
  95    code will not be sharable; but that's better than failing completely.  */
  96
  97 #define NO_REMAP
  98
  99 /* Define ADDR_CORRECT(ADDR) to be a macro to correct an int which is
 100    the bit pattern of a pointer to a byte into an int which is the
 101    number of a byte.
 102
 103    This macro has a default definition which is usually right.
 104    This default definition is a no-op on most machines (where a
 105    pointer looks like an int) but not on all machines. */
 106
 107 #define ADDR_CORRECT(ADDR) ((int)ADDR)
 108
 109 /* Cast pointers to this type to compare them. */
 110
 111 #define PNTR_COMPARISON_TYPE    void *
 112
 113 /* Some machines that use COFF executables require that each section
 114    start on a certain boundary *in the COFF file*.  Such machines should
 115    define SECTION_ALIGNMENT to a mask of the low-order bits that must be
 116    zero on such a boundary.  This mask is used to control padding between
 117    segments in the COFF file.
 118
 119    If SECTION_ALIGNMENT is not defined, the segments are written
 120    consecutively with no attempt at alignment.  This is right for
 121    unmodified system V.  */
 122
 123 #define SECTION_ALIGNMENT 0x7
 124
 125 /* arch-tag: 9de8e6ed-ddd8-4480-8308-17ddd7c86559
 126    (do not change this comment) */